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R. K. DELL
permanent attachment is about the only method available to achieve
this end.
6. Molluscan Biogeography (Fig. 13)
The writer (Dell, 196413, 1969) was concerned to examine the Mollusca of that section of the Antarctic Continent which did not show
FIG. 13. Distribution of some wide ranging Antarctic bivalves (data from Dell, 1969).
0 Adamusaium colbecki;
Cyclocardia asturtoides; [7 Limutula pygmum;
Lhnatula hodgaoni; A G a a r c a notorcadem’e; A Philobrya ancblaevie; V
T hracia meridio?adie; V Yoldia (Aequiyoldia) eightsi.